20742662 has 4 divisors (see below), whose sum is σ = 31113996. Its totient is φ = 10371330.

The previous prime is 20742653. The next prime is 20742677. The reversal of 20742662 is 26624702.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5185664 + ... + 5185667.

It is an arithmetic number, because the mean of its divisors is an integer number (7778499).

Almost surely, 2^20742662 is an apocalyptic number.

20742662 is a deficient number, since it is larger than the sum of its proper divisors (10371334).

20742662 is a wasteful number, since it uses less digits than its factorization.

20742662 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10371333.

The product of its (nonzero) digits is 8064, while the sum is 29.

The square root of 20742662 is about 4554.4112682102. The cubic root of 20742662 is about 274.7608366917.

The spelling of 20742662 in words is "twenty million, seven hundred forty-two thousand, six hundred sixty-two".